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// Copyright (C) 2018-2022 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
//
#ifdef USE_OPENCV
# include <fstream>
# include <iostream>
// clang-format off
# include <opencv2/opencv.hpp>
# include "samples/slog.hpp"
# include "opencv_wrapper.h"
// clang-format on
using namespace std;
using namespace FormatReader;
OCVReader::OCVReader(const string& filename) {
img = cv::imread(filename);
_size = 0;
if (img.empty()) {
return;
}
_size = img.size().width * img.size().height * img.channels();
_width = img.size().width;
_height = img.size().height;
}
// Set the maximum number of printed warnings; large image directories can otherwise be overwhelming
static size_t resize_warning_count = 0;
const size_t max_resize_warnings = 5;
std::shared_ptr<unsigned char> OCVReader::getData(size_t width = 0, size_t height = 0, ResizeType resize_type = ResizeType::RESIZE) {
if (width == 0)
width = img.cols;
if (height == 0)
height = img.rows;
size_t size = width * height * img.channels();
_data.reset(new unsigned char[size], std::default_delete<unsigned char[]>());
if (width != static_cast<size_t>(img.cols) || height != static_cast<size_t>(img.rows)) {
if (resize_warning_count < max_resize_warnings) {
slog::warn << "Image is resized from (" << img.cols << ", " << img.rows << ") to (" << width << ", " << height
<< ")" << slog::endl;
resize_warning_count++;
} else if (resize_warning_count == max_resize_warnings) {
slog::warn << "Additional image resizing messages have been suppressed." << slog::endl;
resize_warning_count++;
}
}
cv::Mat resized;
if (resize_type == ResizeType::RESIZE) {
resized = cv::Mat(cv::Size(width, height), img.type(), _data.get());
// cv::resize() just copy data to output image if sizes are the same
cv::resize(img, resized, cv::Size(width, height));
} else if (resize_type == ResizeType::PAD_RESIZE)
{
cv::Mat padded;
// Find the larger side out of width and height of the image
int max_dim = std::max(img.rows, img.cols);
// Calculate padding for shorter dimension
int top = (max_dim - img.rows) / 2;
int bottom = (max_dim - img.rows + 1) / 2;
int left = (max_dim - img.cols) / 2;
int right = (max_dim - img.cols + 1) / 2;
// Add padding (0, i.e., black) to make the image a square
cv::copyMakeBorder(img, padded, top, bottom, left, right, cv::BORDER_CONSTANT, cv::Scalar());
cv::resize(padded, resized, cv::Size(width, height));
std::memcpy(_data.get(), resized.data, resized.total() * resized.elemSize());
} else {
slog::err << "Specified resize type is not implemented." << slog::endl;
std::exit(1);
}
return _data;
}
#endif
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